Simultaneous Implementation of Photonic Logic or and and Gates for CSRZ-OOK Signals

A simultaneous implementation of photonic or and and logic gates for 10-Gb/s carrier-suppressed return-to-zero on–off-keying (CSRZ-OOK) signals is demonstrated using degenerate and nondegenerate four-wave mixing in a 60-m highly nonlinear photonic crystal fiber (HNL-PCF). Two different wavelength combinations of three-input lights, two input CSRZ-OOK data together with a CSRZ-OOK clock, are proposed to flexibly select the output wavelength of two logic and gates and one logic or gate. Experimental demonstrations at 10-Gb/s CSRZ-OOK format with clear waveforms, correct spectra, and bit-error rate verify the logic integrity of the scheme. Although three input wavelengths with a fixed spacing must be reserved in advance, the proposed scheme is still promising for future ultra-high-speed optical signal processing applications, due to the femtosecond response of the HNL-PCF nonlinearity.